Sounds like the .30 caliber carbine has served you well. I didn't like mine. I even had a single action revolver 3 screws in the same caliber. The revolver, the casings were always getting stuck and difficult to bring out with the ejector rod. The carbine wasn't all that accurate. The mini-14 is also chambered in .223 and I've heard it is now in the common 5.56. Maybe this would be better. Better in ballistics, better in accuracy, better in long distance. As for using the shock buffers, I don't think they are necessary. They weren't used in the Military and they did get used and abused too often and still functioned without the buffers. The .30 caliber carbine was proven to be ineffective or inadequate. Which is why the AR was brought out in .223 then 5.56. The AR platform seemed to be better in all aspects. It had it problems back then but today is has proven to be a good gun in accuracy.